268 IHE PJEACH Alil> NECTAEINE. 



if these faU, the trees should be destroyed and the- soil whalty 

 moTed. Where the dra.inage is good and water plentiful, submerging 

 the borders for twenty-four hours would be likely to prove an effeotnal 



VIII. — Jaundice, or the Yellows. 



This is not very common, though a mild form of the disease is- 

 often met with. All abnormal paleness of colour in peach leaves 

 should be viewed with suspicion, and when these show the slightest 

 shade of yellow it reveals a very bad state of health. Stagnant water, 

 the burying too deeply the collar of the plant in the ground, -and slow 

 starvation, from over-cropping or poverty of soil, are apt to engender this 

 disease. The use of unsuitable stocks is also said to favour the yellows. 

 This is probable enough ; but how it came to be believed that working 

 the peach on peach stocks was a chief cause of this singular disease is- 

 more difficult to understand. Assuredly seedling peaches are generally 

 very vigorous and as far as possible from developing this disease. 

 Possibly our soil in the open air may prove in the spring too cold for the 

 roots of the peach, and that, on the whole, the almond and plum suit it, 

 better. 



IX. — Honeydem 



This is considered by some writers a distinct disease, and not a 

 product of aphides. This is more than doubtful. It is not very 

 common on the peach in its worst form, as seen so often on the beech_ 

 It is a sweet excretion proceeding from the leaves, and no doubt involves 

 a considerable waste of sap, as well as derangement of function. It may 

 possibly arise from more sap being forwarded by the roots than can be 

 elaborated by the leaves, and the excess is thickened into a sort of syrup, 

 acd passed through the pores of the leaf, which it covers with a pure 

 glutinous fluid. As, however, I have never found honeydew on the 

 peach disassociated from aphides, its extirpation may be treated of under 

 aphides. Washing off, by the use of the garden engine, is the best, 

 remedy. 



X. — Super-swelling, of the Scion over the Stocks. 



This is, perhaps, more of a malformation than a disease, though no doubt 

 it has an' injnrionsi effect on the healbh, and not seldom shortens the 



